Husqvarna 420 Automatic Spark Plug
The Husqvarna 420 Automatic (350cc) takes an NGK CR7E spark plug, gapped to 0.028".
Key takeaways
- Spark plug: NGK CR7E.
- Iridium upgrade: NGK CR7EIX.
- Gap: 0.028 inch - set it before fitting.
- Covers 1986-1988.
Buy the plugs for your Husqvarna 420 Automatic
The standard plug is the exact-fit replacement. The iridium version drops into the same spot, lasts longer, and fires a little stronger for a few dollars more. Many engines take more than one - check how many cylinders you have.
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Frequently asked
What spark plug does a Husqvarna 420 Automatic take?
The Husqvarna 420 Automatic takes an NGK CR7E spark plug, gapped to 0.028 inch. The iridium upgrade is the CR7EIX.
What is the spark plug gap for a Husqvarna 420 Automatic?
The spark plug gap for the Husqvarna 420 Automatic is 0.028 inch. Check and set the gap before fitting a new plug - most powersports plugs need a small adjustment out of the box.
Can I use an iridium plug in a Husqvarna 420 Automatic?
Yes. The CR7EIX is the iridium version of the CR7E - same fit, longer life, and a slightly stronger spark. It is a straight upgrade.
More parts for your Husqvarna 420 Automatic
We cover the other consumables for your machine too - the exact fit, cited, in one place.